Operation research in management of engineering systems / Proceedings XXII annual convention of........................................engineering system 7-10 December, 1989 - India: Operational Research Society of India, 1989 - 263+11-32p. Vol. 1 263p.Vol. 2 11-32p. Subjects--Topical Terms: Proceedings Universal Decimal Class. No.: 519.8:621(082.2) / M9